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28. The Dakota Digital temperature-sending unit was bolted onto the passenger side head. The oil-sending unit was attached to the rear of the block behind the intake manifold. The surface and threads should be clean before the new sensor is installed. Make sure to wrap the threads of the fittings with Teflon tape. The tachometer and voltage lines come right off the LS harness. The blue arrow is the clip for the knock sensors. The yellow arrow is the cam sensor.